Good to see you got that taken care of harry j! Now you can start down the path of the extended drain . SSO is a rock solid product and I can't wait to see how it does at the 15k mile mark.

Thank you pickled, I am on the road to increased OCIs. I will likely stretch the next interval out to 4,000 miles and then do a UOA. If I like the way it looks, 5,000 is not out of the question.

BTW, I have decided, based on 6 UOAs, to change the EAO every oil change. The ISO oil cleanliness code jumped 2 or 3 numbers when I left the used filter in place, for example 17/17/14 vs 15/15/12 with a clean one.

Did you ever get the antifreeze leak fixed? If the leak was so minor that you never notice the level go down then the coolant tabs or a big bottle of liquid barsleak should have taken care of it. I have seen that stuff eliminate some serious leaks before.

Have all 6 UOAs been done at about 3k and are you going to share the results? It would be interesting to see the trending even though your engine has had some fuel/coolant issues.

Yes, all UOA's have been done at close to the 3,000 mile mark. I will get the information together and post them as soon as I get a chance.

So far, I have resisted adding anything to the antifreeze. The coolant level has not changed at all, so I am thinking that it could be a residual left over from a recent head gasket failure. I am going to moniter the situation and see if perhaps the potassium level starts to dimish with subsequent OC's.

Here is the averages for 17,000 miles

Aluminum------2
Chromium------1
Iron----------7
Copper--------2
Lead----------0
Tin-----------1
Molybdenum----2
Nickel--------0
Manganese-----0
Silver--------0
Titanium------0
Potassium-----43
Boron---------8
Silicon-------8
Sodium--------8
Calcium-------3782
Magnesium-----13
Phosphorus----679
Zinc----------785
Barium--------0

Here's all 5 Uoas;

Miles 235,025-- 238,127-- 241,134 -- 245,629 -- 249,006
Aluminum----2-------3---------3----------2---------2
Chromium----1-------1---------1----------1---------3
Iron--------6-------7---------7----------6---------8
Copper------1-------1---------1----------2---------3
Lead--------0-------0---------0----------1---------1
Tin---------1-------0---------0----------1---------1
Molybdenum--2-------3---------3----------2---------2
Nickel------0-------0---------0----------0---------0
Manganese---0-------0---------0----------0---------0
Silver------0-------0---------0----------0---------0
Titanium----0-------0---------0----------0---------0
Potassium---45------53--------48---------27--------44
Boron-------8-------10--------8----------8---------7
Silicon-----13------5---------3----------14--------6
Sodium------8-------10--------8----------6---------8
Calcium-----3468----3889------3893-------3794------3867
Magnesium---12------15--------12---------14--------14
Phosphorus--644-----702-------705--------651-------695
Zinc--------721-----846-------746--------781-------830
Barium------0-------0---------0----------1---------1

SUS Viscosity-55.1---56.8-----56.5-------57.2------57.7
cSt Viscosity-8.81---9.31-----9.21-------9.41------9.56
Flashpoint----355----425------345--------385-------370
Fuel%--------.5------<.5------1.5--------<.5-------<.5
Antifreeze----?--------?-------?----------?---------?
Water%--------0--------0-------0----------0----------0
Insolubles%--.2-------.4------.2---------.3---------.4
TBN----------7.5-------6.5----6.5--------9.7--------8.9
ISO Code--16/15/12--18/17/15--17/17/14--15/15/12--17/16/14

Fuel dilution is impacting the viscosity. Do you plain on running it longer? Tbn is strong. For 3k mile drains, I think any cheap 5w20 could handle it.

buster, yes, I plan to run it a bit longer. The last run was almost 3,400 miles. I want to try 4,000 to see how things look and then go from there. I am very please with the SSO's performance and will probably stick with it. What do you think about the new Amsoil racing oils? It would be interesting to see a UOA using one of them.

I'm sure they are very good.

I'm not an expert on ISO codes, but all of those results appear to be very clean, filter reuse or not.

Yeah Tempest, it's the EAO filter, totally awesome! If you can get past the cost of this superb filter, it beats any filter now available by a wide margin. Unless something comes along that's better, I will not even consider putting any other filter in my Civic.

I'm thinking that the EAO specs can be improved on if they use more nano fiber material. I would love to see, say, a 12,000 mile filter that allows good oil flow and cleans even better than the present EAO.

I think buster went 27K miles on one over several OCI. All the UOAs came back good. I've got around 15K on mine with 3 OCI...forgot the actual number...